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1. Goals
▪Understand REST
▪What
▪Why
▪Get comfortable with ASP.NET Web API
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2. Agenda
▪Quick Demo
▪REST and Why You Should Care
▪Building an API with ASP.NET Web API
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3. What is REST
▪Stands For:
▪REpresentational State Transfer
▪Architectural Style based on HTTP
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4. What is HTTP?
▪Well defined protocol (web browsers, web servers, etc.)
▪Request and Response
▪Stateless
▪Request Contents
▪URL
▪HTTP Verb
▪Header
▪Message Body
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5. What is REST
▪Architectural Style based on HTTP
▪Resources (Things)
▪Verbs (Actions)
▪GET, POST, PUT, DELETE, etc.
▪Response gives a representation of the resource (XML, JSON,
image, etc.)
More Info: http://en.wikipedia.org/wiki/REST
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6. Resources
▪GET http://en.gravatar.
com/userimage/7361283/02c115a8f3967a.jpg
▪GET https://www.diigo.com/user/jfjcn1/webApi
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7. HTTP Verbs
▪GET
▪Gets 0 or more of a resource (thing)
▪POST
▪Creates a resource (hopefully)
▪PUT
▪Updates a resource (hopefully)
▪DELETE
▪Deletes a resource (hopefully)
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8. REST in Action
Actions:
▪ GET
▪ POST
▪ PUT
▪ DELETE
Resources:
▪ http://somedomain.com/users/1
▪ https://otherdomain.com/products
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9. REST Responses
▪Responses come back as an HTTP Status Code + message (maybe)
▪HTTP Status Codes
▪1XX – Request Received and I’m processing it
▪2XX – Request Received and processed it successfully!
▪3XX – Client must do something else to complete the request
▪4XX – Client made an error
▪5XX – Server error
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10. Popular Status Codes
▪200 – Success
▪201 – Created
▪301 – Moved Permanently (AKA “redirect”)
▪404 – Not Found
▪401 – Unauthorized
▪500 – Internal Server Error (AKA “oh crap!”)
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11. On to the codez…
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12. Why REST?
▪Everyone/everything speaks HTTP
▪Web applications are moving to JavaScript + AJAX
▪Lightweight compared to SOAP
▪Caching of resources (server decides)
▪http://en.gravatar.com/userimage/7361283/02c115a8f3967a.jpg
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13. REST is NOT a standard
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14. Thank You!
fernando@TalentRiot.com
http://kaizencto.com
@avfernando
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